Continuity mistake: When Cloe and Watson are talking and drinking tea in the kitchen, the positions of the cups and the teabag string change depending on the camera angle. Not just where on the placemat, but the orientation.

When Holmes and Watson are arguing in the kitchen, Watson puts her mug and phone on the counter. A few times during the scene, the mug switches which side of the phone it's on. The first time it's plausible Watson moves it when off camera, but subsequent to that, we can see enough of Watson to tell she doesn't make enough movements to change the position of the mug.